<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>

   <!-- <form>
        <input type="text">
        <input type="submit">

    </form> -->

    <form>
        用户名：<input type="text">
        <br>
        密码：<input type="password">
        <input type="submit" value="登录">
    </form>

</body>

</html>